Very Slow NBD on 10Gb Network

[wa15]

Physical Veeam server holding all roles (repo/proxy/B&R) with 10Gb network access. Running v9.5 U4 and 24 hours.
Source storage is a Nimble. Both storage and computer are on 10Gb. Running vSphere 6.5

With NBD, I only see an average of about 25MB/sec read times on the VMDKs. Highs of 40MB/sec and lows of 10MB/sec. Bottleneck is always showing "source ~95%".

I realize NBD is slower than hot add or direct storage access due to data traveling over vSphere management stack, but should I not be expecting faster speeds on a 10Gb network?

Thanks in advance!

[Gostev]

Yeah, you should normally expect 10x better performance NBD on 10Gb Ethernet... check your network hardware or its settings, as your bottleneck statistics is pretty telling. Thanks!

[wa15]

Thanks, will do. May reach out to support for this as well.